BRC MULTIPOINT SEQUENTIAL INJECTION SYSTEM
|@J^O Catalog Download (PDF 1980KB)
|The system make-up
The BRC multipoint sequential injection system is based on components validated
in the automotive field by carmakers, such as:
the refuelling point, the tank, the pipes reaching the front of the vehicle,
the gas cut-off solenoid valve, the reducer-vaporiser of the GENIUS and
GENIUS MAX type, the injectors, the rubber connection pipes, the gas/petrol
changeover switch with gas level gauge, the gas pressure and temperature
sensors and the MAP sensor, the gas level sensor; and on innovative components
conceived to assure and improve safety or to implement new functions, such
the Europa multivalve, the Fly SF ECU, the injectors rail.
The control of the fuel-air mixture titer is assured by the original petrol
ECU while running on gas too (system of the series type); the gaseous injection
system is only aimed at turning
the control sent from the petrol ECU to the injectors into an equivalent
control to the gas injectors. The whole diagnostic performed by the petrol
ECU is this way preserved and kept
on working while running on gas too (apart from the control of the petrol
injectors that are excluded while running on gas), assuring the OBD compatibility.
The petrol injection times-gas injection times translation is carried out
through predictive algorithms enabling the gas injection in every cylinder
during the petrol injection on the corresponding injector.
The Fly SF ECU measures the gas pressure that feeds the injectors and rectifies
the gas injection times depending on the value read, it makes practically
the gas quantity injected independent compared with the small pressure
The series operation of the system assures and preserves the strategies
used by the carmaker, as the management of the out-of-revs and of the cut-off
in tip-out, the drive control, the cut-off of injectors on the cylinders
where the missed ignitions are spotted, and the control of carburetion
during the drain phase of the can.
The petrol injection times-gas injection times translation maps are functions
of the engine r.p.m. and of the manifold absolute pressure (MAP) and are
automatically varied by a self-adaptative strategy that pursues the possible
wear and tear of both systems. We assure this way that the gas system behaviour
repeats, in very instant of the system life, the behaviour of the specific
vehicle being equipped.
The OBD compatibility is assured by the system working principle of the
series type and by the sophisticated diagnostic of the sensors and of the
actuators carried out by the gas ECU. In the event of failure of an original
component of the vehicle, the petrol ECU will be able to regularly diagnose
it. The vehicle will be therefore always able to run in observance of the
OBD norms. Therefore the vehicle will be always able to work respecting
the OBD rules.
In case of exhaustion of LPG, the changing-over to petrol occurs automatically.
It is especially comfortable and safe as the user can keep on driving undisturbed,
without operating on the changeover switch. The automatic changing over
to petrol could be immediately indicated to the driver, through a buzzer
and special optical signals. Also the changeover from a fuel to another
is in sequential way. By following a patented strategy, the Fly SF ECU
is able to act the changeover on each cylinder one at a time, making so
unnoticed the change from a condition to the other in every driving condition.
It has been paid particular attention, in order to obtain an advanced gas
feeding system with the maximum technological knowledge, but in the meantime
versatile and easy to use.
For this reason SEQUENT is a gopenh system, usable both on vehicles developed
by BRC, and on those vehicles directly developed by installers duly trained.
In the point of view to assure a rugged and reliable system, all the protections
and precautions asked to BRC by the carmakers have been taken (filters,
waterproof connections, protections
from installation mistakes, etcc).
The sequential injection of SEQUENT allows to obtain excellent results for what concerns polluting emissions, always assuring the performances and a very good driving level.
The capacities to feed are over 30 kW per injector, being able to pilot
up to 8 injectors, 240 kW in all corresponding to 326 HP; vehicles provided
with aspirated or supercharged engines can be installed indifferently.